Find the value of x with explanation please

1. preform the indicated operation. then estimate to see whether the proposed result is reasonable. 811.1 - 8.039 803.071 803.061 803.161 831.061 2. the ordered pair (1, 2) lies in which quadrant? quadrant ii quadrant iv quadrant iii quadrant i 3. sean tries to drink 3 liters of water every day how my millimeters of water does he drink in a day? 0.3 ml 0.003 ml 3,000 ml 30 ml 4. find the least common multiple. (lcm). 10, 36 5 180 20 360

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class